Sheet roofing



April 23, 1929. R, C, NEPTUNE 1,710,104

SHEET ROOFI NG Filed Dec. l, 1927 5 14 5 //Vf/vrom Patented Apr. A23, 1929.

UNITED STATES "PATENT OFFICE.

RICHARD C. NEPTUNE, F MITCHELL, INDIANA; FEMMA WOOD NEPTUNE ADIINIS- TRATRIX OF SAID RICHARD C. NEPTUNE, DECEAYSED.

SHEET ROOFING.

Application led December 1, 1927. Serial No. 236506.

My invention relates to sheet rooting and the process of using same.

Heret-ofore in the manufacture of slate covered sheet roofing, it has been the practice to completely coat 'the sheet from one side edge to the other; and in the `application of such roofing, it has been the common practice to lap the upper sheet two inches over the lower sheet, secure them with a suitable roofing cement and then nail them together through the lapping joint. These practices produce, among others, the following disadvantages, namely: flhe joint or seam is exposed to View and to the weather and not only presents an unsightly appearance but, in case the margin of either sheet should stretch or pucker, or, in case the cement should fail to hold properly, the joint is liable to open and permit water to be blown through it. f The principal object of the present invention is to overcome these disadvantages and consists in a new roofing sheet that is easy of application and in the process of applying same hereinafter described and claimed.

In the accompanying drawing, wherein like numerals refer to like parts wherever they occur, a

Fig. l is a vplan view of a portion of a sheet of roofing conforming to my invention, l

Fig. 2 is a plan view of the lapping and adjacent portions of two roof sheets, part of the .seam being shown coated;

Fig. 3 is a cross sectional view of lapped sheets prior to coating the same; the section being taken on the llne 3 3 in Fig. 2;. and

Fig. 4 is a similar view with the seam coated, the section being taken on the line 4-4 in Fig. 2.

According to the present invention, the roofing is made in the form of a continuous strip of sheet 1 of the kind commonly called roll roofing and is coated with particles of slate 2. Instead, however, 'of making the strip with the slate extending entirely from one side thereof to the' other, both side margins of my stri are left bare on the slate covered side. ne margin 3 of the strip, being the margin hereinafter referred to as the underlapping margin, is left bare for the width of about two inches more or less. The other side margin 4, hereinafter referred to as the overlapping margin, is left bare laid on the wide undeiilappmg margin of said rst mentioned strip. It is preferable to. have the edge of the upper sheet spaced slightly from the coated portion of the under-sheet, whereby the top of the bare surface; of the overlapping margin will be substantially flush with the coated surface of the under-sheet, and a groove or channel .5 will be formed with the bare surface of the underlapping margin at its bottom and with the edge of the overlapping sheet forming one side and the slate coating of the under sheet'forming the opposite side of said chaii nel or groove. With the sheets in this position, nails 6 are driven through the lapped portions of the sheets. Then roofing cement 7 is applied to the channel or groove above mentioned and to the bare overlapping margin. Then ,particles of slate 8 are applied to the cement with an air gun. Pre t'- erably the particles of slate are of the same color and size as those constituting the main coating; but in some cases it may be desirable to use slate particles of a different color or a different size or other material.

By reason of the joint or seam being formed by the lapping of margins that are not coated with slate or mineral particles, it is eas'ier to make a tight joint than where one of the surfaces is so coated. ,By reason of the groove or channel above mentioned, the liquid or plastic cement applied therein.1nay readily work its way under the edge of the upper sheet and fill any cracks that may beleft after the nails are applied. As the upper sheet is applied to the uncoated margin of the lower sheet, the edge of such upper sheet is less elevated and therefore'less exposed to View and to wear and tear by lthe elements than where the upper sheet is applied to a slate coated margin ofthe under sheet. Accordingly, when the slate coating is applied to the seam portions, the seam or joint is much less conspicuous.

What I claim is:

1. Strip roofing wherein the side margins of one tace are left bare and the portion between said margins is covered with slate or like material, one' bare margin being narrower than the other bare margin, whereby the narrow bare margin of one such strip may be made to overlap the wide bare margin of another such strip sufficiently for nailing and with the edge of the upper strip spaced from the coated portion of the lower strip sufciently to expose the edge of the upper strip and enough of the surface of the lower strip for application thereto of roong cement.

2. A roof comprising strips of roong wherein side margins of one face are left bare and the portions between said margins are covered with slate or like aterials, a bare margin of one strip overlapping a bare margin of another strip with thefedge of the upper strip spaced from the slate of the lower strip and the exposed bare portions being coated with plastic cement with mineral particles thereon.

Signed at Mitchell, Indiana, this 25th day of November, 1927.

RICHARD C. NEPTUNE. 

